I recently bought a 2008 kfx450r from a friend and it didn't run when I bought it, but he sold it to me for 300 bucks so its worth it. It's not starting for some reason, but when I spray starting fluid in the intake, it will start, and then stay running for any length of time. Has anyone else had this problem before? I seem to be at a loss here because it's got good compression, has fuel, spark, clean injectors, proper timing, and it even runs like a champ when I can get it to start. Any help here would be appreciated. I'd really rather not take it in to the kawie dealer out here....